Machinery Malfunctions. Test 6 – Online Maritime Tests

When a new cylinder liner is fitted to a 2-stroke engine, which of the following steps should be taken ? I. Increase the cylinder oil flow. II. Reduce the cylinder load. III. Reduce the oil flow.

I and III
I, II and III
II and III
I and II

What is the function of item 'PC' ?

Pressure Controller activating 3-way valve solenoid
Pressure Container admitting air to air bottle
Piston Controller activating compressor piston movement
Pressure Container activating automatic pressure release valve

What is item 'U' and how does it act on item 'S' ?

Item 'U' is the upper pressure limit valve activating the solenoid.
Item 'U' is the unloader lifting the compressor suction valve.
Item 'U' is the uplifter of the air bottle's safety valve.
Item 'U' is the activator for the safety release valve.

After water-washing the turbocharger exhaust side, the blower starts to vibrate. What has happened?

Foundation bolts for the blower unit are loose
Inlet filter partly clogged.
Water drain for washing system is clogged
The rotor blades are damaged or the blades are not properly cleaned

The amount, condition and appearance of liquid collecting in bilges over time is a sign of _____ ?

specific system losses.
sloppy engine room management.
flooding taking place.
leakage or overflow.

If the performance of a centrifugal pump deteriorates over time (tons/hour x height in metres) it is usually due to _____

condition of the pump housing.
condition of the ball bearing.
cavitation of the impeller.
excessive wear between impeller and wear ring.

When taking a set of crankshaft deflections the + sign is indicated, example +4. This means that _____

one main bearing on one side is 4/100 mm bigger than the other.
the crankwebs have closed in by 4/100 mm.
the crankpin location is 4/100 mm out of centre.
the crankwebs have opened up by 4/100 mm.

Which are the parameters that steer the automatic level control system of the boiler shown here ?

The level controller.
The level transmitter.
Water level and steam consumption.
Feedvalve and feed by-pass valve.

In the operation shown what is being checked?

Axial location of the labrynth gland.
Turbine wheel/nozzle clearance.
Axial position of the compressor impeller.
Axial movement in the thrust bearings.

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